Method of drying casein.



W. M. BROWNELL.

' METHOD OF DRYING CASEIN. APPLICATION FILED MAY 5. 191a. RENEWED FEB.20. 1917. I

L mfiwo Paten'tedSept. 25,1917.

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WILJDIAM M.BROWNELII, BROOKLYN, NEW YORK, ASSIGNOR F THWE-IEUURTHSTQABTHUR N. HOOD AND JOHN T. NIGHTING-ALE; 015 BOSTON,- MA$SACHUSETT$.

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Application filed May 5, 1916 Serial No. 95,682.

To all whom it may concern:

Be it known that 1, WILLIAM M. BROWN- ELL, a citizen of the UnitedStates, residing at the borough of Brooklyn, county of Kings, Stateof'New York, have inventeda certain irew and useful Improvement 1111Methods of Drying Casein, of which the following is a specification,reference being had therein to the accompanying drawings.

My invention has for its object a new and improved method of dryinggreen curds during the manufacture of casein, after they rennet caseinbecause the curds precipitated by the use of nature.

a My novel process affords a method of'drymg casein which is so rapid inits action that the drying may be completed before bacterial action orfermentation can take place "to anyappreciable extent. It thereforeprorennet are of a sticky adhesive 'duces acasein which is low in' acidcontent and which may be employed with a mimmum of alkali. It is alsolight in color and therefore capable of'usein the manufacture of finecoated papers and for other purposes where a light colored casein isrequired.

My invention will be fully understood by reference to the followingdescription, taken in connection with the accompanying drawing, and thenovel features thereof are point- .ed out and fully defined in the claimat the closehereof. v I; I

' In the drawing I'have shown a diagrammatic iew indicating a machine bymeans of'which'my process may be practised.

Theprocess consists'essentially 1n heating the green curds after thewhey has been drawn 01f until the green curds have softened andcondition to be rendered homogeneous by mechanical action. Then I forcethe mate Specification or Letters JPatent.

artly melted, and are therefore in a Patented ept. 25, rent.

Renewed February 20, 1917. Serial No. 149,932

rial through heated tubes in which they are subjected to a suficientdegree of heat to convert the moisture contained therein into steam andfinally permit the material to emerge suddenly into the open air so thatthe moisture will pass ofi in the form of steam. In practising myinvention T take the green curds after the whey has been drawn oft andplace them in a vat heating the curds to a temperature of from 135 to180 Fahrenheit. The curds are thus sof tened and are converted into aplastic doughy sticky mass. The mass is then placed in the hopper A ofthe machine shown in the drawings, by which it is fed by suitable mixingand impelling mechanism, shown. in the drawings as a screw revolving inthe casing 3. This screw serves to render the mass homogeneous and alsoto force it through the tubes 4 which are subjected to heat by means ofthe steam jacket 5. This steam jacket contains a suitable heatingmedium, as for instance steam at about 100 lbs. pressure. The heatconverts the moisture in the casein into steam as it is forced throughthe tubes, and as the material emerges from the and bacterial growth ispractically eliminated. j What I claim is The method of drying caseinwhich con sists in heating it until it becomes a plastic adheslve mass,then'passing it under pressure through a heated passage, and thenallowmgit to emerge into the open air.

In testimony whereof I afix my signature,

1n presence of two witnesses.

. WJILLIAM M. BROWNELL.

Witnesses:

ALBmTUs Wne'r, Wa l J. GOVERT.

